Label folders to show what’s in them

It feels like a solid reckon that knowing what’s in a folder before you
click on it will help you navigate around.

However, what do you show in a folder if you’re filtering by template
type? We think that:
- if you’re not filtering you should see all folders, even empty ones
- if you’re filtering you should only see folders that will get you to
  relevant templates

This matches what happens when you filter templates, we don’t ‘grey out’
the non-email templates, we hide them completely.

The logic then extends to how we describe the contents of a folder, ie
we won’t count its subfolders if they don’t contain templates of the
type we’re looking for. This means that however you see the folder
described (eg ‘3 templates, 1 folder’) will match what you see when you
click into it.

app/templates/components/message-count-label.html

@@ -55,3 +55,26 @@
     {%- endif -%}
   {%- endif %}
 {%- endmacro %}
+
+
+{% macro folder_contents_count(number_of_folders, number_of_templates) %}
+
+  {% if number_of_folders == number_of_templates == 0 %}
+    Empty
+  {% endif %}
+
+  {% if number_of_templates == 1 %}
+      {{ number_of_templates }} template
+  {%- elif number_of_templates > 1 -%}
+      {{ number_of_templates }} templates
+  {%- endif -%}
+
+  {%- if number_of_folders and number_of_templates %}, {% endif -%}
+
+  {%- if number_of_folders == 1 -%}
+      {{ number_of_folders }} folder
+  {%- elif number_of_folders > 1 -%}
+      {{ number_of_folders }} folders
+  {% endif %}
+
+{%- endmacro %}

app/templates/views/templates/_template_list.html

@@ -1,4 +1,5 @@
 {% from "components/checkbox.html" import unlabelled_checkbox %}
+{% from "components/message-count-label.html" import folder_contents_count %}
 
 <nav id=template-list>
   {% for template_folder in template_folders %}
@@ -15,7 +16,12 @@
           {{ template_folder.name }}
         </a>
       </h2>
-      <p class="message-type">Folder containing {{ template_count }} template{% if template_count != 1 %}s{% endif %}</p>
+      <p class="message-type">
+        {{ folder_contents_count(
+          current_service.get_template_folders(template_folder.id, template_type)|length,
+          current_service.get_templates(template_type, template_folder.id)|length,
+        ) }}
+      </p>
     </div>
   {% endfor %}
   {% for template in templates %}

tests/app/main/views/test_template_folders.py

@@ -106,8 +106,8 @@ def test_post_add_template_folder_page(client_request, service_one, mocker, pare
             {},
             ['Text message', 'Email', 'Letter'],
             [
-                'folder_one Folder containing templates',
-                'folder_two Folder containing templates',
+                'folder_one 2 folders',
+                'folder_two Empty',
                 'sms_template_one Text message template',
                 'sms_template_two Text message template',
                 'email_template_one Email template',
@@ -121,25 +121,41 @@ def test_post_add_template_folder_page(client_request, service_one, mocker, pare
             {'template_type': 'sms'},
             ['All', 'Email', 'Letter'],
             [
-                'folder_one Folder containing templates',
+                'folder_one 1 folder',
                 'sms_template_one Text message template',
                 'sms_template_two Text message template',
             ],
         ),
+        (
+            'Templates / folder_one',
+            {'template_folder_id': PARENT_FOLDER_ID},
+            ['Text message', 'Email', 'Letter'],
+            [
+                'folder_one_one 1 template, 1 folder',
+                'folder_one_two Empty',
+            ],
+        ),
         (
             'Templates / folder_one',
             {'template_type': 'sms', 'template_folder_id': PARENT_FOLDER_ID},
             ['All', 'Email', 'Letter'],
             [
-                'folder_one_one Folder containing templates',
+                'folder_one_one 1 folder',
             ],
         ),
+        (
+            'Templates / folder_one',
+            {'template_type': 'email', 'template_folder_id': PARENT_FOLDER_ID},
+            ['All', 'Text message', 'Letter'],
+            [],
+        ),
         (
             'Templates / folder_one / folder_one_one',
             {'template_folder_id': CHILD_FOLDER_ID},
             ['Text message', 'Email', 'Letter'],
             [
-                'folder_one_one_one Folder containing templates',
+                'folder_one_one_one 1 template',
+                'letter_template_nested Letter template',
             ],
         ),
         (
@@ -164,7 +180,6 @@ def test_should_show_templates_folder_page(
     expected_nav_links,
     expected_items,
 ):
-
     mock_get_template_folders.return_value = [
         _folder('folder_two'),
         _folder('folder_one', PARENT_FOLDER_ID),
@@ -181,7 +196,8 @@ def test_should_show_templates_folder_page(
             _template('email', 'email_template_two'),
             _template('letter', 'letter_template_one'),
             _template('letter', 'letter_template_two'),
-            _template('sms', 'sms_template_nested', parent=GRANDCHILD_FOLDER_ID)
+            _template('letter', 'letter_template_nested', parent=CHILD_FOLDER_ID),
+            _template('sms', 'sms_template_nested', parent=GRANDCHILD_FOLDER_ID),
         ]}
     )